Database Develop

SM-N950W : Mobile Data not working.

Hello,
My note 8 cannot connect to mobile data. Whenever I activate it, nothing happens I don't get any mobile data signal what so ever. I also checked the APN's configuration with my Mobile carrier and they were unable to solve it.
It should be noted that my note 8 has a stock Canadian firmware and I am using in Morocco with a Moroccan sim card

Khalidbenraiss said:
Hello,
My note 8 cannot connect to mobile data. Whenever I activate it, nothing happens I don't get any mobile data signal what so ever. I also checked the APN's configuration with my Mobile carrier and they were unable to solve it.
It should be noted that my note 8 has a stock Canadian firmware and I am using in Morocco with a Moroccan sim card
Click to expand...
Click to collapse
did you check with your morocco sim does include data from your plan? Also which carrier are you using in Moroccan? it could be either your plan doesn't include data plan or the carrier doesn't have the UMT/LTE band for your note 8

athris said:
did you check with your morocco sim does include data from your plan? Also which carrier are you using in Moroccan? it could be either your plan doesn't include data plan or the carrier doesn't have the UMT/LTE band for your note 8
Click to expand...
Click to collapse
Yes, I still have around 1gig of data available and My plan includes data.
My service provider is INWI and they do have LTE band since The same sim card worked on my previous J5 2016 normally.
I forgot to mention that, After activating mobile data and roaming, I checked the sim status in the setting where I found that Mobile network state is DISCONNECTED and Roaming is not running.

Khalidbenraiss said:
Yes, I still have around 1gig of data available and My plan includes data.
My service provider is INWI and they do have LTE band since The same sim card worked on my previous J5 2016 normally.
I forgot to mention that, After activating mobile data and roaming, I checked the sim status in the setting where I found that Mobile network state is DISCONNECTED and Roaming is not running.
Click to expand...
Click to collapse
Can you test if you can make call or text? if so, i will suggest double check the apn. I checked your carrier in Morocco , you should be able to get HSPA data connection in Canadian Version Note 8(N950W) unless you select (LTE ONLY).

athris said:
Can you test if you can make call or text? if so, i will suggest double check the apn. I checked your carrier in Morocco , you should be able to get HSPA data connection in Canadian Version Note 8(N950W) unless you select (LTE ONLY).
Click to expand...
Click to collapse
I can confirm that I can make phone calls and send texts without a problem.
I checked all options and none worked .
As for the apn, the configuration message was sent to me by my service provider itself.
I performed a factory reset that didn't help too.

Since you can make the call, I don't think it is something wrong with the phone. I checked there's only 1 hspa band and none for lte available for note 8 from your carrier. I guess either double check with the carrier for the apn or maybe the phone just can't pick the b1 hspa signal from your location.

athris said:
Since you can make the call, I don't think it is something wrong with the phone. I checked there's only 1 hspa band and none for lte available for note 8 from your carrier. I guess either double check with the carrier for the apn or maybe the phone just can't pick the b1 hspa signal from your location.
Click to expand...
Click to collapse
I won't mind HSPA since there's not much difference between LTE and HSPA in Morocco. I doubled checked with my carrier today and they told me that I have to wait for 48H for them to look into the issue.
The weird thing is when I used an app called LTE Discovery I found that I do have a signal for LTE band 3 yet I have no internet.
It is mostly the service provider's fault, I think.

Khalidbenraiss said:
I won't mind HSPA since there's not much difference between LTE and HSPA in Morocco. I doubled checked with my carrier today and they told me that I have to wait for 48H for them to look into the issue.
The weird thing is when I used an app called LTE Discovery I found that I do have a signal for LTE band 3 yet I have no internet.
It is mostly the service provider's fault, I think.
Click to expand...
Click to collapse
They might be similar to AT &T where they need to recognize the device IMEI number before allowing full data access onto their Network.
Sent from my SM-N950U using Tapatalk

Limeybastard said:
They might be similar to AT &T where they need to recognize the device IMEI number before allowing full data access onto their Network.
Sent from my SM-N950U using Tapatalk
Click to expand...
Click to collapse
I have never thought of it till now. I'll definitely mention this to my carrier ASAP.

Limeybastard said:
They might be similar to AT &T where they need to recognize the device IMEI number before allowing full data access onto their Network.
Click to expand...
Click to collapse
I checked with my service provider. Unfortunately, they don't need to recognize the IMEI number.
They tried to shift the blame to my phone saying that I might have a faulty device. It doesn't make any sense.

Khalidbenraiss said:
I checked with my service provider. Unfortunately, they don't need to recognize the IMEI number.
They tried to shift the blame to my phone saying that I might have a faulty device. It doesn't make any sense.
Click to expand...
Click to collapse
First thing I'd do is research and see if it's true what your service provider told you. It might not be. Second use another sim from another network in your device. Third borrow someone else's IMWI sim and use it in the note 8. Also check APN again.
Did the phone receive 4G or LTE prior to coming to Morocco with the same device?
I also don't fully understand on your earlier post about the phone status not being roaming. It shouldn't be roaming status if using a local sim card.
Sent from my SM-N950U using Tapatalk

Limeybastard said:
First thing I'd do is research and see if it's true what your service provider told you. It might not be. Second use another sim from another network in your device. Third borrow someone else's IMWI sim and use it in the note 8. Also check APN again.
Did the phone receive 4G or LTE prior to coming to Morocco with the same device?
I also don't fully understand on your earlier post about the phone status not being roaming. It shouldn't be roaming status if using a local sim card.
Click to expand...
Click to collapse
I still haven't tried another INWI nor another Moroccan sim card.
I have no idea whether or not it received 4G Before coming to Morocco since I won the phone from a Dbrand's giveaway. I think it's brand new.
Shouldn't roaming be active when you activate it in menu ?
I turned on mobile data roaming and nothing happens. Check the picture for details.

I turned off my Data Roaming and the Mobile network state remained the same - connected. I'd think " Mobile network state " has anything to do with roaming being on or off unless one is roaming out of their Network onto another network.
Sent from my SM-N950U using Tapatalk

Limeybastard said:
I turned off my Data Roaming and the Mobile network state remained the same - connected. I'd think " Mobile network state " has anything to do with roaming being on or off unless one is roaming out of their Network onto another network.
Click to expand...
Click to collapse
I turn them on and off yet their status remain disconnected. I understand why.
I really don't understand how to get mobile data working on my phone.

Hopefully someone else will try and assist.
In the meantime
On the phone dialer enter *#0011# and *#2263#
Also, the mobile network state will be disconnected if you are connected to WiFi.
Should get the following screen.
Also make sure that the correct APN is entered and active / selected.
Then try and go to the connections menu and toggle lte/3g/2g... to 2 or 3 g and back to to 4g to see what happens.
Also make sure Mobile Data is turned ON.
Go-to settings then search for Mobile Data.
Sent from my SM-N950U using Tapatalk

Limeybastard said:
Hopefully someone else will try and assist.
In the meantime
On the phone dialer enter *#0011# and *#2263#
Also, the mobile network state will be disconnected if you are connected to WiFi.
Should get the following screen.View attachment 4398676View attachment 4398677
Also make sure that the correct APN is entered and active / selected.
Then try and go to the connections menu and toggle lte/3g/2g... to 2 or 3 g and back to to 4g to see what happens.
Also make sure Mobile Data is turned ON.
Go-to settings then search for Mobile Data.
Sent from my SM-N950U using Tapatalk
Click to expand...
Click to collapse
Thanks a lot for your efforts.
It turned out that my service provider does not support the bands on my note or something.
I tried an other provider's sim and that worked like charm.
Again thanks alooot for your efforts.

Khalidbenraiss said:
Thanks a lot for your efforts.
It turned out that my service provider does not support the bands on my note or something.
I tried an other provider's sim and that worked like charm.
Again thanks alooot for your efforts.
Click to expand...
Click to collapse
That's weird as when I checked Frequency check website with device sm-n950W and your service provider INWI , it lists it as fully compatible. The other Moroccan networks were not though.
This would be the second instant whereby Frequency check has got it wrong. First being Samsung device I used to own.
Sent from my SM-N950U using Tapatalk

Limeybastard said:
That's weird as when I checked Frequency check website with device sm-n950W and your service provider INWI , it lists it as fully compatible. The other Moroccan networks were not though.
This would be the second instant whereby Frequency check has got it wrong. First being Samsung device I used to own.
Click to expand...
Click to collapse
I checked the frequency myself and I came to the same conclusion.
I was only told today by an INWI agent that devices from Canada and USA always face the same issue.
I triend orange which didn't work too. Gladly, IAM worked as it is the largest and oldest network in Morocco.
From now on, I won't believe what websites say till I see for myself.

Khalidbenraiss said:
I checked the frequency myself and I came to the same conclusion.
I was only told today by an INWI agent that devices from Canada and USA always face the same issue.
I triend orange which didn't work too. Gladly, IAM worked as it is the largest and oldest network in Morocco.
From now on, I won't believe what websites say till I see for myself.
Click to expand...
Click to collapse
Glad it's all sorted.
Sent from my SM-N950U using Tapatalk

Does the P20 Pro work in the US on T-Mobile with VoLTE?

Does VoLTE work on T-MOBILE in the USA on P20 Pro out of the box?

KevinAce said:
Does VoLTE work on T-MOBILE in the USA on P20 Pro out of the box?
Click to expand...
Click to collapse
Yes it does.

gadget8888 said:
Yes it does.
Click to expand...
Click to collapse
Where has this been confirmed?

Screenshot or it didn't happen ?

https://photos.app.goo.gl/cyBqpxXvuIhNUPwn1

gadget8888 said:
https://photos.app.goo.gl/cyBqpxXvuIhNUPwn1
Click to expand...
Click to collapse
This doesn't mean anything.
Can you post screenshot while making a phone call if it shows LTE or drops to H+??

Does wifi calling work?

An update on this matter...
As far as I can tell Huawei has been fixing one of their shortcomings and allowing VoLTE support on many more carriers despite the phone being the wrong reason.
I've heard from a reliable source that, although I didn't think it was true, indeed VoLTE works on T-Mobile US.
Note that this may or may not depend on the version/branding of the P20 Pro.
Wifi calling does not and has never worked on T-Mobile US with Huawei phones unfortunately.

This guy gets VOLTE on tmobile:
https://www.youtube.com/watch?v=pIqKuE1Dx40

as best I can tell it works.. I make a call and band 12 stays connected throughout the call when VOLTE is enabled in settings.

Does 4G symbol remain while on call
deejaylewlew said:
as best I can tell it works.. I make a call and band 12 stays connected throughout the call when VOLTE is enabled in settings.
Click to expand...
Click to collapse
Can you try this please?
1. Turn WiFi off.
2. Make sure 4G symbol is showing on your cellular bars at the top of the screen.
3. Make a phone call. You can even call 611 for T-MO customer service, and make sure that 4G symbol still remains while on the call and that it does not change to 3G or anything else? And if you can post a screenshot, it would be much appreciated.
Are you using the CLT-L29 and what region? European or Latin American version?

KevinAce said:
Can you try this please?
1. Turn WiFi off.
2. Make sure 4G symbol is showing on your cellular bars at the top of the screen.
3. Make a phone call. You can even call 611 for T-MO customer service, and make sure that 4G symbol still remains while on the call and that it does not change to 3G or anything else? And if you can post a screenshot, it would be much appreciated.
Are you using the CLT-L29 and what region? European or Latin American version?
Click to expand...
Click to collapse
Correct it's the dual sim CLT-L29 Build Number is clt l29 8.1.0.106(c636)
That method of testing would be a step backward. I have already confirmed I am calling over Band 12. VOLTE is working, atleast for me on T-Mobile. I wasn't expecting it to from reviews but it was a nice surprise.

Thanks
deejaylewlew said:
Correct it's the dual sim CLT-L29 Build Number is clt l29 8.1.0.106(c636)
That method of testing would be a step backward. I have already confirmed I am calling over Band 12. VOLTE is working, atleast for me on T-Mobile. I wasn't expecting it to from reviews but it was a nice surprise.
Click to expand...
Click to collapse
I see your point and thank you so much for the info. Out of curiosity, are there WiFi calling settings showing up or no? That would be a double bonus.

KevinAce said:
I see your point and thank you so much for the info. Out of curiosity, are there WiFi calling settings showing up or no? That would be a double bonus.
Click to expand...
Click to collapse
No go on the WiFi calling, no settings for it.

WiFi calling
deejaylewlew said:
No go on the WiFi calling, no settings for it.
Click to expand...
Click to collapse
A workaround to get WiFi calling is to download T-Mobile Digits from play store and you can use the app to make wifi calls. You may need to sign up for T-MOBILE Digits. I'm not sure. I was a beta tester for Digits and they since let me keep the service for free on 3 devices.

KevinAce said:
A workaround to get WiFi calling is to download T-Mobile Digits from play store and you can use the app to make wifi calls. You may need to sign up for T-MOBILE Digits. I'm not sure. I was a beta tester for Digits and they since let me keep the service for free on 3 devices.
Click to expand...
Click to collapse
I've been using google voice / hangouts dialer (or whatever they want to call it this month) for a few years now. I hardly ever use T-mobile for calls, works out well when you want an international phone. Less reliance on the network features.
Out of curiosity do you remember if T-Mobile digits worked for incoming calls as well?

Digits
deejaylewlew said:
I've been using google voice / hangouts dialer (or whatever they want to call it this month) for a few years now. I hardly ever use T-mobile for calls, works out well when you want an international phone. Less reliance on the network features.
Out of curiosity do you remember if T-Mobile digits worked for incoming calls as well?
Click to expand...
Click to collapse
Yes it does work. And the fact that you can mimic one number or multiple numbers as many times as you'd like on multiple devices is pretty cool.

brother phone NEO-L29 Mate RS dual sim with sim t-mobile.pl i have options to VoLTE and WIFI calling

VoLTE definitely works and Wificalling menu is hidden. Don't think it works, yet but that might change at some point. Use a program like quickshortcutmaker and search for calling. The last option seems to be for att and the second from bottom is TMobile.
Sent from my CLT-L09 using Tapatalk

International
apol said:
brother phone NEO-L29 Mate RS dual sim with sim t-mobile.pl i have options to VoLTE and WIFI calling
Click to expand...
Click to collapse
I believe that's because you are using an international phone in an international country on an international version of T-MO.

honor note 10 volte setup

please help me for enabling volte setting in my device to use volte service provided in my country india

Sorry its showing not active. ..see screen short uploaded
In huawei this method cannot be used to enable volte

SmartPhonesFan said:
you don't have to enable it as it it already enabled by default you need your network provider to support it and run it
Click to expand...
Click to collapse
In am using jio with is already volte network and even in tried airtel with supports volte...but in both networks or sir when i call it get diverted to 2g or 3g ....airtel supports 2g and 3g nekworks so call get connected where else in jio network is shows no network available as it dont have other bands.so in call make call.
Volte mode is needed for hi calling with is missing in my honor note 10

SmartPhonesFan said:
No it isn't missing
On huawei.cn says it is avail only in China.. Because it is China version?
When u go to root explorer/vendor /build prop it says volte =true..
Click to expand...
Click to collapse
Yes exactly this the issue. ..it supports chian but no in my country...that only in want how to enable here in my country india...my phone is rooted and in want that volte setup in my phone...my phone has volte=true

abhirathod1990 said:
Yes exactly this the issue. ..it supports chian but no in my country...that only in want how to enable here in my country india...my phone is rooted and in want that volte setup in my phone...my phone has volte=true
Click to expand...
Click to collapse
You yourself also have honor note 10 right...please help to get this volte option

SmartPhonesFan said:
Go to your network provider shop and ask them if they have enabled it for you .. You MAY BE need different packs .. or deals from Your OP
I just put EE-uk into Mate 9 (right) and it automatically showed option wifi-calling.. If I would remove EE sim it will goes away..
And there is calling over WiFi or 4G.. It is little bit weird that 4g network is packed in to wifi calling.. Which clearly is not
It should be separated option.. But it is just the way how wronlgy EE operator did it..
On the left it is P9 but I did it force way as it was patch applied because I was rebranding P9 to China and flashing oreo so patched VoLTE option.. It wasn't there previously in android 7
Click to expand...
Click to collapse
In p9 u got volte optiom by patch...that patch in wat for my. Phone.....amd in have confirmed for my operator volte is anable in my number...jio so hasbonly volte service her in our country.

SmartPhonesFan said:
yeah there is option in P9 but it doesn't work haha it is fake .. or it would work in china only
Click to expand...
Click to collapse
How u got that option?
Did u applied any module?
I talked to my network operator they said sim has volte enable....software changes only can help me now to get that option

SmartPhonesFan said:
for p9 here but it doesn't work it is like dummy second post there is patch https://forum.xda-developers.com/p9/development/rebrand-update-tool-hwota7-p9-eva-t3820849
and on mate 9 it will show up when sim EE is inserted
Click to expand...
Click to collapse
If volte is only for domestic and not for foreign...than wat if i change region to china

SmartPhonesFan said:
i know i was explaining dat to him just check my prev posts ..
Click to expand...
Click to collapse
how to do that...how to change region

OnePlus 7 Pro International Version & TMobile

Has anyone had any problems with using the International Version with TMobile? Did you have any issues? Wifi Calling and whatnot?

Psyscope said:
Has anyone had any problems with using the International Version with TMobile? Did you have any issues? Wifi Calling and whatnot?
Click to expand...
Click to collapse
I only just made the switch today and I've been using it like the last 5-6 hours, so I can't really attest to signal strength away from home. That being said, my data speeds on LTE are consistent with what I had on the T-Mobile firmware (here at home), and WiFi calling may actually be working better now (not joking here, but again, very early here). VOLTE is working as it should as well. Call waiting is broken on T-Mobile, no matter what firmware you have... So this issue persists and it's known on the OnePlus Community forums.
I should also mention there is no quick setting to turn WiFi calling off (nor anything in the regular settings menu). Seems the only way to turn WiFi calling off would be to turn off WiFi, or use the log kit app (dialer code) to get into engineering settings.
Everything seems really good for me so far. I'll update in a day or so. When I go to work, my LTE download speeds break 100mbps... Let's see if that continues with the international firmware.
Sent from my OnePlus7Pro using XDA Labs

stmims1124 said:
I only just made the switch today and I've been using it like the last 5-6 hours, so I can't really attest to signal strength away from home. That being said, my data speeds on LTE are consistent with what I had on the T-Mobile firmware (here at home), and WiFi calling may actually be working better now (not joking here, but again, very early here). VOLTE is working as it should as well. Call waiting is broken on T-Mobile, no matter what firmware you have... So this issue persists and it's known on the OnePlus Community forums.
I should also mention there is no quick setting to turn WiFi calling off (nor anything in the regular settings menu). Seems the only way to turn WiFi calling off would be to turn off WiFi, or use the log kit app (dialer code) to get into engineering settings.
Everything seems really good for me so far. I'll update in a day or so. When I go to work, my LTE download speeds break 100mbps... Let's see if that continues with the international firmware.
Click to expand...
Click to collapse
I have a setting to turn wifi calling off in the settings.

truckerdewd said:
I have a setting to turn wifi calling off in the settings.
Click to expand...
Click to collapse
May I ask, where in the settings is that? I've done what I thought was a very thorough search, in the settings app and within the dialer app. Maybe I'm an idiot.
Edit: I finally found the WiFi calling settings in the dialer app. Still no quick setting tile for me however.
Sent from my OnePlus7Pro using XDA Labs

So I assume the qs tile isnt there after updating to international?

The native messaging app does not show the contact names.
Sent from my GM1915 using Tapatalk

BobAzzon said:
So I assume the qs tile isnt there after updating to international?
Click to expand...
Click to collapse
You are correct... At least on my phone.
Sent from my OnePlus7Pro using XDA Labs

stmims1124 said:
May I ask, where in the settings is that? I've done what I thought was a very thorough search, in the settings app and within the dialer app. Maybe I'm an idiot.
Edit: I finally found the WiFi calling settings in the dialer app. Still no quick setting tile for me however.
Click to expand...
Click to collapse
I'm about to switch back to the international version as soon as I make a backup and copy it to my laptop. I don't remember if there was a quick setting tike for it or not. I don't use wifi calling so I didn't pay a lot of attention to see if there was a quick setting tile.

I have WiFi calling in quick settings on my TMobile version

mxyzptlk41 said:
I have WiFi calling in quick settings on my TMobile version
Click to expand...
Click to collapse
I have the T-Mobile phone running international. I don't have a setting for WiFi calling.
Sent from my GM1915 using Tapatalk

ledvedder said:
I have the T-Mobile phone running international. I don't have a setting for WiFi calling.
Sent from my GM1915 using Tapatalk
Click to expand...
Click to collapse
Ah, you may need to revert back to the TMO for it

ledvedder said:
I have the T-Mobile phone running international. I don't have a setting for WiFi calling.
Sent from my GM1915 using Tapatalk
Click to expand...
Click to collapse
It's under Wi-Fi & Internet then select SIM & network settings then select SIM 1 and you will see it under enhanced communications

ledvedder said:
I have the T-Mobile phone running international. I don't have a setting for WiFi calling.
Click to expand...
Click to collapse
The international firmware does have *working* WiFi calling w/ T-Mobile, though the setting is kinda of hidden within the dialer app's settings menu (3 for button up at the top right, see screenshots). This is also where the VOLTE setting is found. Took me a while to find because there's like two different "SIM" settings menu, and I thought they were the same thing.
There is, however, NO quick settings tile. Perhaps an app like System UI Tuner or something similar could resolve that though.
Sent from my OnePlus7Pro using XDA Labs

Question Mi 11 Ultra VoLTE question (solved)

Anyone with T-Mobile network (US) do you have VoLTE ?

avetny said:
Anyone with T-Mobile network (US) do you have VoLTE ?
Click to expand...
Click to collapse
Not T mobile but ATT I believe VoLTE is active but HD calling is not for me.

jmikepr said:
Not T mobile but ATT I believe VoLTE is active but HD calling is not for me.
Click to expand...
Click to collapse
Wait, so you on tmobile and don’t have VoLTE ?

avetny said:
Wait, so you on tmobile and don’t have VoLTE ?
Click to expand...
Click to collapse
No I'm on ATT

jmikepr said:
No I'm on ATT
Click to expand...
Click to collapse
ok i just quickly checked several utube videos and i see “global” device have VoLtE icon.
So I guess with global rom it will be fix bro

I have the Chinese variant of the Mi 11 Ultra and by default, I was unable to see the options to enable VoLTE and VoWifi.
If you enter the following codes into the dialer, it should work:
VoLTE *#*#86583#*#*
VoWiFi/WLAN *#*#869434#*#*
These codes disable/enable carrier compatibility check. Then go into Sim Card and enable VoLTE or VoWifi.
Since VoLTE is required for RCS in Google Messages to work, enabling this also allowed for 'Chat Features' to be ready on my phone.
Quick note: I am in Canada on the Virgin Mobile Canada network.

I did this but the icons never came up.
I'm in australia using telstra and got the china version

pafc66 said:
I did this but the icons never came up.
I'm in australia using telstra and got the china version
Click to expand...
Click to collapse
Did you get the pop-up stating "carrier check disabled"?
Go to settings>sim card & mobile networks>select sim 1>you should see the options here.
Hope it works!

dj_aj said:
Did you get the pop-up stating "carrier check disabled"?
Go to settings>sim card & mobile networks>select sim 1>you should see the options here.
Hope it works!
Click to expand...
Click to collapse
Yeah I got it and enabled it but I can't see the volte or HD icon?

Have you rebooted?
Have you made a call to see if you stay on 4G?

I'm using EU ROM now but has VoLTE on my Chinese stock, see attached image

pafc66 said:
I did this but the icons never came up.
I'm in australia using telstra and got the china version
Click to expand...
Click to collapse
Even I face same problem I'm using boost sim ,I've enquares the Carrier but they said they support vote , I'm not able to get volte working in my device

Same issue. Got the Chinese variant of the Mi 11 Ultra, running 12.5.12 EU ROM and I'm on Boost (Australia). I've done all the dialler codes and still no VoLTE icon. Calls drop to 3G.

i've done a deep search regarding VOLTE on Telstra in Australia as I am facing this issue too, and I found out the following result:
This issue happened because Telstra did not share its network settings with a few companies, Xiaomi, Oneplus, and others.
On a different thread on Oneplus section, there is a way to fix it that requires root, so we add Telstra settings manually, but whenever a tiny update shows up, then we'll need to repeat it. a restart won't affect it, just an update because it replaces modified network settings file with original one.
so to summarise it, unless a software update with the new settings come up, then it won't work.
And btw, the VOLTE is working on MIUI first version of 12, and MIUI 11. but after the update, settings lost. and this is not an issue with MI 11 ultra, it is with all xiaomi and oneplus devices and a few others.
Do not waste your time on it, and just cope with what we got and be patient.

hassanaliyeh said:
i've done a deep search regarding VOLTE on Telstra in Australia as I am facing this issue too, and I found out the following result:
This issue happened because Telstra did not share its network settings with a few companies, Xiaomi, Oneplus, and others.
On a different thread on Oneplus section, there is a way to fix it that requires root, so we add Telstra settings manually, but whenever a tiny update shows up, then we'll need to repeat it. a restart won't affect it, just an update because it replaces modified network settings file with original one.
so to summarise it, unless a software update with the new settings come up, then it won't work.
And btw, the VOLTE is working on MIUI first version of 12, and MIUI 11. but after the update, settings lost. and this is not an issue with MI 11 ultra, it is with all xiaomi and oneplus devices and a few others.
Do not waste your time on it, and just cope with what we got and be patient.
Click to expand...
Click to collapse
Thanks for this information, sincerely appreciated. My only concern is Telstra turning off their 3G network by June 2024. Let's hope the issue is solved before then. Fortunately my call quality is completely fine without VoLTE at the moment as reception is good. I'm sure other providers will start turning off 3G too. A very odd issue and I'm really surprised it hasn't been fixed.

Did any one manage to find a solution ?

Any solution yet to make volte and vowifi work on Telstra and boost Australia? Thanks